<?php // $Id: course.php,v 1.6.2.1 2008/03/08 15:27:01 skodak Exp $
	  // Allows a creator to edit custom outcomes, and also display help about outcomes

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards  Martin Dougiamas  http://moodle.com	   //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

require_once '../../../config.php';
require_once $CFG->dirroot.'/grade/lib.php';
require_once $CFG->libdir.'/gradelib.php';

$courseid = required_param('id', PARAM_INT);

/// Make sure they can even access this course
if (!$course = get_record('course', 'id', $courseid)) {
	print_error('nocourseid');
}
require_login($course);
$context = get_context_instance(CONTEXT_COURSE, $course->id);
require_capability('moodle/course:update', $context);

/// return tracking object
$gpr = new grade_plugin_return(array('type'=>'edit', 'plugin'=>'outcomes', 'courseid'=>$courseid));

// first of all fix the state of outcomes_course table
$standardoutcomes	= grade_outcome::fetch_all_global();
$co_custom		   = grade_outcome::fetch_all_local($courseid);
$co_standard_used	= array();
$co_standard_notused = array();

if ($courseused = get_records('grade_outcomes_courses', 'courseid', $courseid, '', 'outcomeid')) {
	$courseused = array_keys($courseused);
} else {
	$courseused = array();
}

// fix wrong entries in outcomes_courses
foreach ($courseused as $oid) {
	if (!array_key_exists($oid, $standardoutcomes) and !array_key_exists($oid, $co_custom)) {
		delete_records('grade_outcomes_courses', 'outcomeid', $oid, 'courseid', $courseid);
	}
}

// fix local custom outcomes missing in outcomes_course
foreach($co_custom as $oid=>$outcome) {
	if (!in_array($oid, $courseused)) {
		$courseused[$oid] = $oid;
		$goc = new object();
		$goc->courseid = $courseid;
		$goc->outcomeid = $oid;
		insert_record('grade_outcomes_courses', $goc);
	}
}

// now check all used standard outcomes are in outcomes_course too
$sql = "SELECT DISTINCT outcomeid
		  FROM {$CFG->prefix}grade_items
		 WHERE courseid=$courseid and outcomeid IS NOT NULL";
if ($realused = get_records_sql($sql)) {
	$realused = array_keys($realused);
	foreach ($realused as $oid) {
		if (array_key_exists($oid, $standardoutcomes)) {

			$co_standard_used[$oid] = $standardoutcomes[$oid];
			unset($standardoutcomes[$oid]);

			if (!in_array($oid, $courseused)) {
				$courseused[$oid] = $oid;
				$goc = new object();
				$goc->courseid = $courseid;
				$goc->outcomeid = $oid;
				insert_record('grade_outcomes_courses', $goc);
			}
		}
	}
}

// find all unused standard course outcomes - candidates for removal
foreach ($standardoutcomes as $oid=>$outcome) {
	if (in_array($oid, $courseused)) {
		$co_standard_notused[$oid] = $standardoutcomes[$oid];
		unset($standardoutcomes[$oid]);
	}
}


/// form processing
if ($data = data_submitted()) {
	require_capability('moodle/grade:manageoutcomes', $context);
	if (!empty($data->add) && !empty($data->addoutcomes)) {
	/// add all selected to course list
		foreach ($data->addoutcomes as $add) {
			$add = clean_param($add, PARAM_INT);
			if (!array_key_exists($add, $standardoutcomes)) {
				continue;
			}
			$goc = new object();
			$goc->courseid = $courseid;
			$goc->outcomeid = $add;
			insert_record('grade_outcomes_courses', $goc);
		}

	} else if (!empty($data->remove) && !empty($data->removeoutcomes)) {
	/// remove all selected from course outcomes list
		foreach ($data->removeoutcomes as $remove) {
			$remove = clean_param($remove, PARAM_INT);
			if (!array_key_exists($remove, $co_standard_notused)) {
				continue;
			}
			delete_records('grade_outcomes_courses', 'courseid', $courseid, 'outcomeid', $remove);
		}
	}
	redirect('course.php?id='.$courseid); // we must redirect to get fresh data
}

$strgrades = get_string('grades');
$pagename  = get_string('outcomescourse', 'grades');

$navlinks = array(array('name'=>$strgrades,
						'link'=>$CFG->wwwroot.'/grade/index.php?id='.$courseid,
						'type'=>'misc'),
				  array('name'=>$pagename,
						'link'=>'',
						'type'=>'misc')
				 );
$navigation = build_navigation($navlinks);
$navigation = grade_build_nav(__FILE__, $pagename, $courseid);
/// Print header
print_header_simple($strgrades.': '.$pagename, ': '.$strgrades, $navigation, '', '', true, '', navmenu($course));

/// Print the plugin selector at the top
print_grade_plugin_selector($courseid, 'edit', 'outcome');

$currenttab = 'courseoutcomes';
require('tabs.php');

check_theme_arrows();
require('course_form.html');

print_footer($course);
?>
